Caused by: java.lang.ClassNotFoundException: org.I0Itec.zkclient.exception.ZkNoNodeException

一、异常内容

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'demoService': FactoryBean threw exception on object creation; nested exception is java.lang.NoClassDefFoundError: org/I0Itec/zkclient/exception/ZkNoNodeException
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:175)
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:103)
at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1626)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:254)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1081)
at com.lmt.trade.dubbo.start.Consumer.main(Consumer.java:16)
Caused by: java.lang.NoClassDefFoundError: org/I0Itec/zkclient/exception/ZkNoNodeException
at com.alibaba.dubbo.registry.zookeeper.ZookeeperRegistryFactory.createRegistry(ZookeeperRegistryFactory.java:37)
at com.alibaba.dubbo.registry.support.AbstractRegistryFactory.getRegistry(AbstractRegistryFactory.java:94)
at com.alibaba.dubbo.registry.RegistryFactory$Adpative.getRegistry(RegistryFactory$Adpative.java)
at com.alibaba.dubbo.registry.integration.RegistryProtocol.refer(RegistryProtocol.java:240)
at com.alibaba.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:63)
at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:60)
at com.alibaba.dubbo.rpc.Protocol$Adpative.refer(Protocol$Adpative.java)
at com.alibaba.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:392)
at com.alibaba.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:300)
at com.alibaba.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:138)
at com.alibaba.dubbo.config.spring.ReferenceBean.getObject(ReferenceBean.java:65)
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:168)
... 6 more
Caused by: java.lang.ClassNotFoundException: org.I0Itec.zkclient.exception.ZkNoNodeException
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 18 more

二、问题原因

dubbo的配置如下，原因在于这里的注册中心使用了zookeeper，但是pom中没有引用zookeeper相关的依赖

<dubbo:application name="lmt-dubbo-provider"/>                                            
                                                                                          
<dubbo:registry address="zookeeper://192.168.199.113:2181" />                             
                                                                                          
<dubbo:protocol name="dubbo" port="20880" />                                              
                                                                                          
<dubbo:service interface="com.lmt.trade.dubbo.rpcService.DemoService" ref="demoService" />

三、解决方式

添加manven依赖解决

<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.3</version>
</dependency>